What is a radio?
The walkie-talkie was a handheld phone that was researched and launched by Motorola during World War II. It was similar in style to a mobile phone with 2 radio receivers and transmitters. This device is capable of 2-way communication with 1 or more people in the same group.
It can be said that radios at the present time are considered to be an extremely important and seemingly indispensable communication device in military organizations, security teams, security guards or construction sites big to help the organization’s apparatus operate more smoothly and professionally.
Structure and operating principles of the radio
Since its inception nearly 70 years ago, radios at the present time have been developed and increasingly perfect in terms of design and technology. But basically a walkie-talkie is only made up of some main parts as follows:
According to the design features, the walkie-talkie is made up of main parts that are the body where the control buttons, a microphone, a music speaker and an antenna are integrated at the top of the head, a light LED indicates low battery and some accessories such as battery, charger, adapter, headset …
Functionally, the radio is made up of four main components:
Signal generator is responsible for encoding the signal and transmitting it.
The signal receiver unit is responsible for receiving and decoding signals and frequency channels that are transmitted to.
The converter will take care of converting the signal into sound so the receiver can hear it.
Common types of radios
Based on the construction characteristics, we can divide the radio into several common types:
Hand-held radios: This is a compact series of mini-radios, not too large output power of only about 3-5W suitable for use in the range of 1-3km.
Desktop or car radio: This model has a stronger power output of about 15-20W and gives clear sound quality within 3-5km, the price will be higher than the handheld.
Relay station: This is a large series of radios equipped with strong transmitting power up to 110W and more than 500 different frequency channels. Works in Analog and Digital modes, and at a very high price.
Large-sized specialized radios: Also known as Radar, a line with extremely large transmitting power up to 6kW and often used in maritime or aviation.
In this article we will focus on handheld radios. Because compared to other radios, handheld radios still have a much wider range of uses.
And to help you make the right choices and save time, below Biareview will mention some important criteria that everyone needs to grasp when buying radios.
Experience of choosing the best radios
A. Choose a walkie-talkie with a compact handheld design
After understanding the need to use radios, the next step we will go to the criteria of the design of the device. With a device that requires high flexibility as a mini radio, we must choose the compact size, light weight for easy operation as well as pocket.
B. Choose safe and durable materials
Choose safe materials, ensure bearing capacity and withstand strong shocks. Usually the radios will have a frame made of metal such as aluminum and the outside is protected by a hard plastic shell that is resistant to water and dirt.
C. Select the machine specifications
In the process of searching for portable radios on the market you will find devices that usually have the same specifications. Especially the parameters of the channel number and transmitter power of the machine.
The most common are radios with a number of channels of about 15-16 channels and a power output of 3-5W. Comes with some signal transmission technologies such as Analog, Digital; Anti-interference feature to ensure the sound is transmitted loudly and clearly to the recipient.
Connection distance is also a top priority, choosing the machines that can transmit signals with the distance as far as possible, at least 1-2km.
D. Integrated convenient lights
The radios are integrated with lights will be extremely convenient and promote their capabilities at night or in low light conditions, far from residential areas.
E. High Battery Capacity
The selection of battery capacity for radios is not much different from when we choose batteries for smartphones. Choose a device with a higher battery capacity as possible.
Particularly for radios, we should also choose Li-ion battery with a capacity of 1500mAh or more. With a battery capacity of about 1500mAh the radio is capable of continuous operation for about 6-8 hours, giving a standby time of up to 3 days.
The advantage of Li-ion batteries is the relatively long life expectancy of the batteries, although sometimes due to the influence of working conditions, you will have to charge the battery continuously.
- Motorola CP6688
If you are looking to buy a mini handset to use, Motorola CP6688 will be the most appropriate choice at the present time. A specialized device is widely available in commercial buildings, factories, industrial parks.
The handset has an extremely compact and lightweight design that weighs just 280g. Designed according to strict military standards such as IP54, MIL-STD 810, the chassis is made from durable aluminum and the outer shell is a hard plastic shell that ensures good strength and impact resistance.
Owning a wide frequency range extending from 400-470MHz with a maximum transmit power of up to 5W, Motorola CP6688 can meet the ability to talk and communicate within a radius of 2 to 7km. Even in environments with obstacles or noise … the battery light is low so that users can quickly charge the device.
Equipped with a total of about 16 channels with convenient channel scanning. In particular, each channel will use a separate audio melody to make it easier for users to identify; not to mention modern signal coding technology will allow to minimize signal interference.
Powered by a 2000mAh Li-ion battery, it provides a continuous working time of up to 12 hours. Included with the device is a full range of accessories such as adapters, desk chargers, antennas or back-mounted bowls so that you don’t have to buy an extra one.
Some other features and utilities such as anti-eavesdropping feature or hands-free voicemail will definitely support your daily work better.
where can you get a Motorola CP6688 online
- Motorola GP368 Plus
Motorola GP 368 Plus is one of Motorola’s most professional radios. Besides improving and overcoming the disadvantages, almost GP 368 Plus still maintains the inherent advantages of the old versions.
In particular, the relatively compact design and light weight of only about 250g makes it easy to pocket or handle to manipulate. Luxurious style with black mainstream, the front is the logo Motorola is embossed quite eye-catching.
Robust construction with an aluminum frame and exterior is covered with a strong plastic shell, thereby meeting the IP65 protection level to ensure absolute protection against water, dirt and dust, high impact at a maximum height of 7m.
With up to 16 channels of machine memory, 6W output power combined with anti-jamming technology delivers loud and clear sound quality within a radius of about 1km, up to 2.5km for maximum with ideal conditions.
Powered by a Li-on battery with a capacity of up to 2500mAh, providing a continuous use time of about 14 hours, a standby time of 6 days. A handy back strap so you can carry it with you throughout the duration of the task.
As a new generation product line has been improved quite a lot, it is not difficult to realize that Motorola GP368 Plus is sold at a relatively high price.
where can you get a Motorola GP368 Plus online
- Baofeng BF-888S
In the segment of cheap radios about $10, Baofeng BF-888S is still a quality choice that you cannot ignore. Compact design, light weight, easy to hold, this device will be an effective assistant indispensable for whose are security.
The device memory contains about 16 channels, unlimited number of connected radios and 5W transmit power combined with wide frequency range from UHF 400 mHZ to 470 mHz for good talk and communication capabilities within the range. Maximum up to 4km in an ideal environment without obstructions.
Despite being a cheap product line, Baofeng BF-888S is still integrated with many functions and utilities. Such as:
Voice channel notification function (Annunciation).
Diverse channel scan modes include: normal scan, priority scan, standard scan and automatic scan.
Limit the time of play (Timeout Timer) via alarm bell.
Data programming feature on computers via PC Programmable software.
Or the channel lock feature when the user is busy (BCLO).
Baofeng BF-888S is powered by 3.7V Lithium battery, the capacity is not too high, but it can still meet the demand of continuous use for about 8 hours, the time for a full charge of the battery is 3 hours.
There is support for more battery saving mode and low battery alarm. Especially lighting flashlight extremely convenient when operating at night or in low light conditions.
where can you get a Baofeng BF-888S online
BaoFeng BF-888S 2 Way Radio with 4 1500mah Batteries and Earpiece Long Range Baofeng Walkie Talkie Two Way Radio (2 Pack) + One USB Programming Cable: Buy it now
Baofeng BF-888S Two Way Radio (Pack of 10) and USB Programming Cable (1PC): Buy it now
BaoFeng BF-888S Two Way Radio (Pack of 20): Buy it now
BAOFENG BF-888S Two-Way Radios (Pack of 2): Buy it now
- Spender TC-400UNT
Spender is a brand from Thailand, specializing in manufacturing and distributing advanced radios. Among Spender’s range of radios, TC-400UNT is undoubtedly the most representative.
The product is manufactured based on Thai modern technology line that meets strict testing standards for durability; Water, dust resistant from USA, Europe such as CE, MIL STD 810F or IP54.
Spender TC-400UNT is a simple, compact radio that is suitable for use in environments such as restaurants, hotels, retail stores, shopping centers or entertainment areas …
Equipped with a power of about 5W, the wide frequency range from UHF 400-470Mhz combines with 16 channels using advanced signal coding technology capable of blocking DPL digital private lines, thereby improving Effective when talking remotely.
Not only is it capable of delivering loud, clear sound at distances up to 3 km when talking. On the radio, there is also an LED light and low battery status indicator so that users can quickly charge the device when the battery is running low.
Although equipped with a relatively low battery capacity, only about 1200mAh, but Spender TC-400UNT can still meet the demand for about 6 hours of continuous use in power saving mode, standby time of 3 days.
where can you get a Spender TC-400UNT online
- Motorola GP3288
Motorola GP3288 belongs to the high-end product line and like most other Motorola branded radios, this product also owns exquisite design, super light weight of only 200g. Compact design like a smartphone should be very convenient to hold and manipulate with one hand.
Basically, Motorola GP3288 still possesses many features inherent in the older versions such as rugged construction of aluminum frame, surrounded by a durable external hard plastic layer to withstand the impact. strong.
In addition, the device also meets IP65 dust and water resistance standards so it can operate effectively in high pressure environments such as tall buildings, construction sites or basements with water.
Good connectivity and conversation at a range of 1-3km. Along with 5W transmit power is a system of 16 channels with a wide frequency range extending UHF 400-470MHz and anti-jamming technology to prevent the voice conversation from being interrupted by noise.
But most importantly, the battery, equipped with a Li-on battery capacity of up to 3800mAh / 7.4V for continuous talk time up to nearly 12 hours. Comes with the machine is 1 Adapter and 1 desk charger; have low battery signal light.
where can you get a Motorola GP3288 online
- Hypersia H1
Hypersia is a quite famous brand radio from Singapore. The continuous development to date Hypersia radios products are increasingly popular and trusted.
Especially in the mid-range segment of about $25-$30 Hypersia H1 is one of the quality options of the company. Featuring a sleek, luxurious black color scheme and compact design; Using high quality materials for bearing capacity and impact resistance are quite good.
The number of channels up to 16 channels, the output power of 5W and the wide frequency range from 400MHz to 480MHz allow the device to operate effectively in many different environments such as the city range of 2km, the water surface of 6km, in when max can up to 12km in the environment from the top of the mountain to the valley.
Hypersia H1 uses a 2000mAh Li-ion battery to meet the needs of continuous operation for about 1 day, the battery saving mode for about 7 days when not in use. Support full charge in just 3 hours with fast charging technology.
Built-in flashlight for use at night or in low light environments.
where can you get a Hypersia H1 online